Category Archives: animal attack

What do you do if a puma attacks?


Licensed under CC BY 2.0 via Wikimedia Commons.

Pumas (Puma concolor) are large feline predators that have been known to attack humans. Slightly more concerning is that most attacks on humans are as prey, not as defense. Thus, there are often signs to warn people going into areas where pumas are common. Doing a google image search will bring up comical parodies of said sign. But do the signs give good advice?


Licensed under CC BY 2.0 via Wikimedia Commons

That was what the authors of this article set to find out. They looked at puma attacks in North America from 1890 to 2000, and found 185 attacks with injury, and 155 more close encounters with no injury. They then analysed the data to see if historically anecdotal risk factors for puma attacks were associated with higher likelihood of injury or death. The variables they analysed were:

  • Age (<13 vs older)
  • Group size (alone, two, or 3 or more)
  • Movement (stationary, quickly, or slowly)
  • Posture (crouching, upright, or on horseback/bicycle)
  • Separation from group, and
  • Noise making

As you can see, the sign above involves 5 of these classic variables. Age, separation from group, posture, noise-making, and movement. An argument can be made for saying that group size is inferred by the number of stick figures in the bottom left pictogram. Interestingly, a couple of those make little or no difference in an attack. There was no association with age or group size.

However, moving quickly did decrease likelihood of severe injury or death in proportion to no injury, while moving slowly or being stationary did not. Crouching versus upright posture did not differ in severity of attack, but being elevated (ie on horseback or bicycle) drastically reduced likelihood of injury or death. Being separated from a group has the highest relative risk, with no uninjured people. Not straying from your group gives you a 40% chance of being uninjured. Last, shouting does help a little over being quiet with regards to escaping uninjured. Doing something even louder (specifically in this article, shooting a gun) makes a larger difference, with a nearly 3:1 odds of escaping uninjured.

So what does this mean if you meet a puma in the wild? Mainly, you need to run away quickly(on a horse if possible). You should probably also carry an air horn, whistle, or some other loud noise-making device for an extra bit of safety. Also, stick with the rest of your party, as there is strength in numbers. Running away flies in the face of what the sign (and classic teaching) tells you, which is to slowly back away. Observations of predatory animals in the wild shows that they often stalk the slower moving members of the herd, as these are easy targets. The article even talks of observed predatory behavior captive cats have towards toddlers and those with unsteady gaits, so it makes sense not to appear weak or infirm to an animal trying to eat you.

And if and animal does attack you, fight back with every means possible.

The Effects of Human Age,Group Composition, and Behavior on the Likelihood of Being Injured by Attacking Pumas
http://www.ingentaconnect.com/content/bloomsbury/azoos/2009/00000022/00000001/art00008

Of note, while pumas carry multiple other names, such as mountain lion, catamount, and others, I specifically did not refer to the animal as a cougar, nor did I refer to the attacks as cougar attacks. I don’t need that kind of traffic coming from google searches.

Big Cats and You

Many people own pets. Somewhere around 30% of US households have dogs, and nearly the same amount have cats. There is certainly some overlap. However, these are the normal people. There are also between 5000 and 7000 tigers in captivity, and only 400 are kept at accredited zoos. Las Vegas shows only account for a small amount of the rest. This creates a problem, as in the US alone there were >300 incidents involving large felines between 1990 and 2011, with 20 fatalities. The likelihood of an escape or attack from an unaccredited facility is higher than that from a zoo. The literature on these attacks is also sparse, with mostly case reports or case series. Media reports are pretty common, since these are sensational events.

Enter this paper, which combed through articles and book chapters (groan) from 1950 to 2013 looking for pretty much everything related to big cats. This was then of course reviewed and narrowed down to ostensibly useful medical information, which was then written up in the review.

A few interesting tidbits:

  •  Tigers are the most frequent killers of humans worldwide, killing 600-800 per year in Asia
  • Man eating lions are much less common
  • The fabled lion pair that the movie “The Ghost and the Darkness” was based on was reported to have killed 130, but actual analysis shows has only found 3 deaths
  • Cheetahs rarely attack people. As in, almost never.
  • In some locales in India, leopards kill more humans than all other cats combined
  • Jaguars attack people more in captivity than in the wild
  • Perhaps you shouldn’t just stand still when a mountain lion attacks, but more on that in a future post.

The good news is that you don’t have to memorize a whole bunch of species specific treatment plans. Basically you want ATLS, and for significant wounds, broad spectrum antibiotics. Big cats are just that, big, and their teeth and claws do a number on our fleshy, unprotected bodies. If a tiger, jaguar, or mountain lion wants you dead (as opposed to just wanting you to leave it alone), it’s probably big enough and smart enough to do it right, by biting your neck so hard that your spinal cord is severed. They typically bite from the back. Conversely, cheetahs, leopards, and lions often bite from the front and crush the larynx. You’re still dead, but it’s a different kind of dead. Even getting swiped with a paw is enough to fracture your skull. So image most injuries, to look for fractures, pneumothoraces, or retained foreign bodies. Angiography is a good idea as well if you’re concerned for vascular injury. Since the animals typically go after Zone 2 of the neck, remember your workup for those injuries.

Data for the use of broad spectrum antibiotics isn’t as good, but since these are rare events, it’s likely less harmful here than for, say, household cat bites. Reports of purulent meningitis after head bites, septic joints, mycotic aneurysms, and other serious suppurative complications gives one pause, even without strong evidence for their use. So use pip/tazo, cefepime, or whatever gram negative/anaerobe combo antibiotic you use at your institution. And yes, people have gotten tetanus from big cat bites, so once again the lifesaving Tdap is recommended. Of note, rabies has been detected in mountain lions, but there isn’t data for the other big cats. The CDC says go ahead and treat unless no potential for being a vector. Also, don’t forget about cat scratch disease, as zoo workers have developed this after contact with big cats.

Finally, the psychiatric component is addressed. Survivors often have PTSD symptoms, and will likely need counseling.  There’s quite a bit more in the 11 page review article, so it’s worth a look.

Human Attacks by Large Felid Carnivores in Captivity and in the Wild
http://www.ncbi.nlm.nih.gov/pubmed/24864068